61851059 has 4 divisors (see below), whose sum is σ = 61884000. Its totient is φ = 61818120.

The previous prime is 61851037. The next prime is 61851067. The reversal of 61851059 is 95015816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61851059 - 2²⁴ = 45073843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61851079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13472 + ... + 17469.

It is an arithmetic number, because the mean of its divisors is an integer number (15471000).

Almost surely, 2^61851059 is an apocalyptic number.

61851059 is a deficient number, since it is larger than the sum of its proper divisors (32941).

61851059 is a wasteful number, since it uses less digits than its factorization.

61851059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32940.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 61851059 is about 7864.5444241863. The cubic root of 61851059 is about 395.4719754810.

The spelling of 61851059 in words is "sixty-one million, eight hundred fifty-one thousand, fifty-nine".